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CVE Record

CVE-2020-28926: ReadyMedia (aka MiniDLNA) before versions 1.3.0 allows remote code execution.

ReadyMedia (aka MiniDLNA) before versions 1.3.0 allows remote code execution. Sending a malicious UPnP HTTP request to the miniDLNA service using HTTP chunked encoding can lead to a signedness bug resulting in a buffer overflow in calls to memcpy/memmove.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

ReadyMedia, also known as MiniDLNA, had a remotely reachable memory corruption flaw before version 1.3.0. A malformed UPnP HTTP request could crash or potentially take control of the service. Organizations should prioritize systems where MiniDLNA is reachable by untrusted networks.

Executive priority

Treat this as a high-priority remediation for any exposed media-sharing hosts. Business urgency is highest where MiniDLNA is reachable outside trusted networks, because the described impact is remote code execution.

Technical view

The issue is a signedness bug in handling HTTP chunked encoding for UPnP requests. It can lead to buffer overflow conditions in memcpy or memmove calls. The supplied record describes remote code execution in ReadyMedia/MiniDLNA before 1.3.0, with Debian security updates published in December 2020.

Likely exposure

Exposure is limited to systems running ReadyMedia/MiniDLNA before 1.3.0, especially where the miniDLNA service accepts requests from untrusted clients. Debian minidlna packages were covered by DSA-4806 and DLA 2489-1.

Exploitation context

The supplied sources describe a malicious UPnP HTTP request using chunked encoding as the trigger. The bundle does not show CISA KEV inclusion or confirmed active exploitation, so active exploitation should not be assumed.

Researcher notes

The evidence supports a pre-1.3.0 ReadyMedia/MiniDLNA RCE via chunked UPnP HTTP parsing and signedness-related overflow. CVSS and CWE details are absent from the supplied bundle, and exploitation-in-the-wild evidence is not provided.

Mitigation direction

  • Upgrade ReadyMedia/MiniDLNA to version 1.3.0 or later.
  • Apply Debian DSA-4806 or DLA 2489-1 package updates where applicable.
  • Restrict miniDLNA access to trusted local networks only.
  • Block external access to UPnP or DLNA service ports.
  • Check vendor guidance for bundled or appliance-provided MiniDLNA builds.

Validation and detection

  • Inventory hosts running ReadyMedia or MiniDLNA.
  • Confirm installed versions are 1.3.0 or vendor-fixed builds.
  • Verify Debian systems include the relevant security update.
  • Review firewall and NAT rules for unintended miniDLNA exposure.
  • Check service logs for abnormal UPnP HTTP request patterns.
Prepared
Confidence
high
Sources
6

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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CVE-2020-28926 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
5Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

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